Slight memory organisation changes

diff --git a/Kernel/arch/x86_64/include/mm_virt.h b/Kernel/arch/x86_64/include/mm_virt.h
index a5abc71..86081f3 100644 (file)
--- a/Kernel/arch/x86_64/include/mm_virt.h
+++ b/Kernel/arch/x86_64/include/mm_virt.h
@@ -21,10 +21,11 @@
  *       8000 00000000 -       8000 7FFFFFFF   31      2   GiB Identity Map
  *       8000 80000000 -       9000 00000000   ~44     16  TiB Kernel Heap
  *       9000 00000000 -       9800 00000000   43      8   TiB Module Space
- *       9800 00000000 -       9900 00000000   40      1   TiB Per-Process Data
- *       9900 00000000 -       9A00 00000000   40      1   TiB Kernel VFS
+ *       9800 00000000 -       9A00 00000000   41      2   TiB Kernel VFS
  *       A000 00000000 -       B000 00000000   44      16  TiB Kernel Stacks
  *       D000 00000000 -       E000 00000000   44      16  TiB Hardware Mappings
+ *       E000 00000000 -       E080 00000000   39      512     GiB     Per-Process Data
+ *       E080 00000000 -       E100 00000000   39      512     GiB     Kernel Supplied User Code
  *       FE00 00000000 -       FE80 00000000   39      512 GiB Fractal Mapping (PML4 510)
  *       FE80 00000000 -       FF00 00000000   39      512 GiB Temp Fractal Mapping
  */
@@ -39,15 +40,16 @@
 #define MM_KHEAP_MAX   (KERNEL_BASE|(0x8001##00000000))
 #define MM_MODULE_MIN  (KERNEL_BASE|(0x9000##00000000))
 #define MM_MODULE_MAX  (KERNEL_BASE|(0x9800##00000000))
-#define MM_PPD_BASE    (KERNEL_BASE|(0x9800##00000000))
-#define MM_PPD_CFG     MM_PPD_BASE
-#define MM_PPD_VFS     (KERNEL_BASE|(0x9880##00000000))
-#define MM_KERNEL_VFS  (KERNEL_BASE|(0x9900##00000000))
+#define MM_KERNEL_VFS  (KERNEL_BASE|(0x9800##00000000))
 #define MM_KSTACK_BASE (KERNEL_BASE|(0xA000##00000000))
 #define MM_KSTACK_TOP  (KERNEL_BASE|(0xC000##00000000))
 
 #define MM_HWMAP_BASE  (KERNEL_BASE|(0xD000##00000000))
 #define MM_HWMAP_TOP   (KERNEL_BASE|(0xE000##00000000))
+#define MM_PPD_BASE    (KERNEL_BASE|(0xE000##00000000))
+#define MM_PPD_CFG     MM_PPD_BASE
+#define MM_PPD_VFS     (KERNEL_BASE|(0xE008##00000000))
+#define MM_USER_CODE   (KERNEL_BASE|(0xE080##00000000))
 
 #define MM_LOCALAPIC   (KERNEL_BASE|(0xFD00##00000000))
 #define MM_FRACTAL_BASE        (KERNEL_BASE|(0xFE00##00000000))

diff --git a/Kernel/arch/x86_64/mm_virt.c b/Kernel/arch/x86_64/mm_virt.c
index 4cce485..b781421 100644 (file)
--- a/Kernel/arch/x86_64/mm_virt.c
+++ b/Kernel/arch/x86_64/mm_virt.c
@@ -266,3 +266,19 @@ void MM_FreeTemp(tVAddr VAddr)
        Log_KernelPanic("MM", "TODO: Implement MM_FreeTemp");
        return ;
 }
+
+
+// --- Address Space Clone --
+tPAddr MM_Clone(void)
+{
+       tPAddr  ret;
+       
+       // #1 Create a copy of the PML4
+       ret = MM_AllocPhys();
+       if(!ret)        return 0;
+       
+       // #2 Alter the fractal pointer
+       // #3 Set Copy-On-Write to all user pages
+       // #4 Return
+       
+}